Q: P0642 code, how do I know what sensors and wiring is associated with reference circuit "A"?
I received an answer back to this question already about my p0642. Mechanic said to unplug sensors to see if code goes away. My issue is that I don't know which sensors are associated with circuit "A". It would be a lot easier to track down. Also if you know a good place to find wiring diagrams that would also be very helpful.
I have back probed map, tps, crankshaft and camshaft sensors and have detected the 5v reference and it stays exactly at 5v. I've also replaced the tps, camshaft sensor, alternator, and battery.
我可以检查或某些布线吗？汽车没有偶然。我确实获得了后右轮传感器和制动信号的难以置信的代码，但它们已被删除，但没有回来。
My car has 128900 miles.
My car has an automatic transmission.
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识别传感器的唯一方法是通过工厂接线图，这太详细了，无法在此处复制。要解决此问题，您必须同时拥有工厂接线图和代码P0642的特定“诊断决策树”，该代码也在手册中发布。有许多潜在的相关传感器，包括气候控制，接近警报，牵引力控制，巡航控制，防盗功能，燃油喷射控制，防抱死制动器控制等等。复杂性是，您需要从制造商那里使用决策树的原因是，错误不一定是传感器本身，而是接线或不良地面的短路，更不用说PCM本身可能是错误的（尽管很少见）或PCM Culd的连接不好。如果您没有手册（它们是昂贵但值得获得的），则可以要求check engine light diagnostic - Code P0642至少在这种情况下，机械师可以引导您完成整个过程，因此，如果出现类似的问题，您可以将其告知您。如果您有进一步的疑问或疑虑，请随时重新连接您的机电，因为我们希望您充分利用修复美元，并帮助您获得最佳的结果。万博体育入口
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